This a interseting subject. Tom The 7/16 is a good line and so is the 3/8 in KM.Blue water also makes good static lines as well.Ultimatly, the strength has priority on choice.Than I go for feel and how it works with your ascending system. Some ropes have a looser lay and some are very tight or hard lay. For static line, I prefer a hard layed rope.The ascenders tend to move smoother up the line. Unless I'm setting a static line for tree work, then of course, I use half inch .If your setting static lines, oh, 150' and plus, you might want to try the 3/8. Much much lighter and still holds the strength. May be a little freaky if you never climed on that small of a line.
I'm going to be hopefully, marketing a static line system soon , called the GLeasy sls sytem. However, I'm very interested in what you folks are using. Could you tell me about how you enter on static lines?
Greg